In reply to MLC:
Thanks for replies everyone. Yes I had heard that some of the lifts will only let you on if you have a guide. Guess we'll find out wherever we rent bikes from. Found a website that says there is 800m uphill if done clockwise- I reckon doable in a day.
We are still deciding whether we would all be up for it as none of us are "proper" mountain bikers! So really it's more how technical the downhill bits are I think.
Me and OH recently did these rides in the Lakes and apart from bouncing off a few times at bottom of Old Coach Road we were fine:
http://mediafiles.thedms.co.uk/Publication/CU/cms/pdf/adventure-cycling-ull...
http://mediafiles.thedms.co.uk/Publication/CU/cms/pdf/adventure-cycling-ull...
So really trying to get an idea how the Sella Ronda would compare technical descent wise to these (in the unlikely event that anyone has done the Sella Ronda and one of these Lakes cycles!)
We're off for a week early September; marek I'll report back!